Why overhead arm curls make your triceps bigger

Original Title

Triceps brachii hypertrophy is substantially greater after elbow extension training performed in the overhead versus neutral arm position

Not medical advice. For informational purposes only. Always consult a healthcare professional. Terms

Summary

People did triceps exercises with one arm overhead and the other at their side for 12 weeks. Even though they lifted less weight with the overhead arm, that arm’s triceps grew more.

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Surprising Findings

Overhead triceps extensions produced 1.5x greater hypertrophy in the long head despite 34–39% lower absolute loads.

Common fitness wisdom says muscle growth requires high mechanical tension from heavy weights—this study shows lengthening the muscle under load may be even more powerful.

Practical Takeaways

Replace at least one of your triceps pushdown sessions per week with overhead cable extensions using slightly lighter weights.

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